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Full text of "The manufacture and properties of iron and steel"

THE UNITED STATES.
457
. The cause of this increase is not simply the opening of new mines, for this is but one factor in the work, the other factor being the great decrease in cost of transportation. These two conditions are interdependent, since the lessening in the cost of freight could not have come about without the transport of enormous tonnages. In no other part of the world has there been such a complete system of handling material worked out on such a gigantic scale; the steam shovels in the mines, the railroads to the ports, the mammoth docks and arrangements for loading vessels in a few hours, the special fleet of ore carriers, the improvement of the locks, the unloading machinery at lower lake ports, and the storage yards and handling apparatus at the Eastern furnaces, each one of these is a link in a chain of specialized machinery, by which it has become possible to transport ore a thousand miles and make pig-iron for less than half a cent a pound.
Table XXII-J shows the production of the different ranges in 1903, and gives figures for comparison with the other large producers. The States of Michigan, Wisconsin and Minnesota, constituting the Lake Superior region, raised 26,573,000 tons of ore.
TABLE XXII-J. American Ore Supply in 1903.
Lake Superior Kanges.	Location.	Bate when opened.	Output ; tons.	Fe. dried at 212F	P.	s.	SiO2.	CaCO3.	H20.
Mesabi ........	N. E. Minn.	1892	13,452,812	61-64	.03-.08	.01	3-5	0.5	8-12
Metiominee.... Marquette ..... Oogeoic ...... .	N.W.Mich. N.W.Mich. N.W.Mich.	1877 1855 1884	4,093,320 3,686214 3,422,341	56-fi2 60-67 58-62	.01-. 75 .02-. 15 .04-. 08	.01 .02 .01	3-6 2-6 3-7	1.0 0.5 0.3	5-10 1-12 10-12
Vermilion ..... Total ___	N. E. Minn.	1884	1.918,584 26,573,271	61-67	.04-.15	tr.	3-5	0.4	1-6
									
Other States.		Other States.	
Alabama ......................	.. 3,684,960	New Jersey ..................	___    484,796
Tennessee ......................	. .    852,704	Georgia .......................	___    443,452
	. . .   801.161	Other States ..................	___ 1,922,150
	644 599		
	. .    540,460	Total ........................	....35,019,308
			
The only competitor is the Minette district of Germany, France, Belgium and Luxemburg, which mined 22,000,000 tons in the same year.